Automation System
Direct Numerical Control means:

using one computer to control several machines
complete elimination of a need for a human operator.
eliminating computers from the manufacturing process
using several computers to control one large machine
None of these

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Automation System
The program execution time:

All of these
will vary depending on the language used
must be slower than the fastest mechanical operation that is to be controlled
cannot be changed once the program is written
None of these

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Automation System
A sequence controller:

performs on/off control functions in relation to time.
None of these
is difficult to program
is no longer in widespread use
is a mechanical only controller

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